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Goodwill and Intangible Assets Reconciliation of purchase price to goodwill recorded (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Jun. 30, 2017 | Dec. 31, 2018 | Nov. 15, 2018 | May 01, 2018
Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |  |  |
Goodwill, Acquired During Period | $ 18,636 |  |  |  |
First BancTrust [Member] |  |  |  |  |
Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |  |  |
Business Combination, Purchase Price |  |  |  |  | $ 26,946
Fair value of securities |  |  |  |  | 59,586
Fair value of OREO |  |  |  |  | 535
Fair value of premises and equipment |  |  |  |  | (9,437)
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  |  | 363,281
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  |  | (385,624)
Fair value of FHLB advances |  |  |  |  | (30,672)
Fair value of subordinated debentures |  |  |  |  | (4,735)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  | (5,224)
Business Combination, Net Fair Value Adjustments |  |  |  |  | (455)
Goodwill Provisionally Recorded |  |  |  |  | 27,400
Goodwill, Acquired During Period |  | $ 26,491 | $ 26,500 |  |
SCB Bancorp [Member] |  |  |  |  |
Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |  |  |
Business Combination, Purchase Price |  |  |  | $ 22,104 |
Fair value of securities |  |  |  | 97,504 |
Fair value of OREO |  |  |  | 438 |
Fair value of premises and equipment |  |  |  | (11,343) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  | 247,561 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  | (347,971) |
Fair value of FHLB advances |  |  |  | (18,971) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  | (12,298) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  | (7,269) |
Business Combination, Net Fair Value Adjustments |  |  |  | (3,468) |
Goodwill, Acquired During Period |  |  | $ 18,600 |  |
Fair Value Adjustments [Member] | First BancTrust [Member] |  |  |  |  |
Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |  |  |
Fair value of securities |  |  |  |  | 320
Fair value of loans |  |  |  |  | 3,463
Fair value of OREO |  |  |  |  | 12
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Mortgage Servicing Rights |  |  |  |  | (1,097)
Fair value of premises and equipment |  |  |  |  | 689
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  |  | 7,875
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  |  | (1,301)
Fair value of FHLB advances |  |  |  |  | 328
Fair value of subordinated debentures |  |  |  |  | (1,451)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  |  | (5,224)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  |  | (5,224)
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets, Net |  |  |  |  | $ 1,860
Fair Value Adjustments [Member] | SCB Bancorp [Member] |  |  |  |  |
Reconciliation of purchase price to goodwill recorded [Line Items] |  |  |  |  |
Fair value of securities |  |  |  | 41 |
Fair value of loans |  |  |  | 3,377 |
Fair value of OREO |  |  |  | 345 |
Fair value of premises and equipment |  |  |  | (1,228) |
Business Combination, Recognized Identifiable Assets and Liabilities Assumed, Loans |  |  |  | 7,868 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deposits |  |  |  | (343) |
Fair value of FHLB advances |  |  |  | (29) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  | (11,070) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill |  |  |  | (7,269) |
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed, Other Assets, Net |  |  |  | $ 13,936 |

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